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Test: Comprehension Based Questions: Analytical Chemistry - JEE MCQ


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7 Questions MCQ Test 35 Years Chapter wise Previous Year Solved Papers for JEE - Test: Comprehension Based Questions: Analytical Chemistry

Test: Comprehension Based Questions: Analytical Chemistry for JEE 2024 is part of 35 Years Chapter wise Previous Year Solved Papers for JEE preparation. The Test: Comprehension Based Questions: Analytical Chemistry questions and answers have been prepared according to the JEE exam syllabus.The Test: Comprehension Based Questions: Analytical Chemistry MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Comprehension Based Questions: Analytical Chemistry below.
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Test: Comprehension Based Questions: Analytical Chemistry - Question 1

PASSAGE-1
p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of  X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate(II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown coloration due to the formation of Z. (2009)

Q. The compound X is 

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 1

Reaction of Y indicates that it is Fe3+ salt.

NOTE : since the product formed (methylene blue) has sulphur in its structure, it should be supplied by the compound X which is thus Na2S.

Thus

Test: Comprehension Based Questions: Analytical Chemistry - Question 2

PASSAGE-1
p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of  X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate(II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown coloration due to the formation of Z. (2009)

Q. The compound  Y is

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 2

Reaction of Y indicates that it is Fe3+ salt.

NOTE : since the product formed (methylene blue) has sulphur in its structure, it should be supplied by the compound X which is thus Na2S.

Thus

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Test: Comprehension Based Questions: Analytical Chemistry - Question 3

PASSAGE-1
p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of  X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate(II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown coloration due to the formation of Z. (2009)

Q. The compound Z is

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 3

Reaction of Y indicates that it is Fe3+ salt.

NOTE : since the product formed (methylene blue) has sulphur in its structure, it should be supplied by the compound X which is thus Na2S.

Thus

Test: Comprehension Based Questions: Analytical Chemistry - Question 4

PASSAGE-2
An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q).
The precipitate P was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H2S in a dilute mineral acid medium. However, it gave a precipitate (R) with H2S in an ammoniacal medium. The precipitate R gave a coloured solution (S), when treated with H2O2 in an aqueous NaOH medium. (JEE Adv. 2013-II)

Q. The precipitate P contains  

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 4

Lead salts give white precipitate of PbCl2 with dil. HCl which is soluble in hot water.

  (White ppt) soluble in hot water.

Test: Comprehension Based Questions: Analytical Chemistry - Question 5

PASSAGE-2
An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q).
The precipitate P was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H2S in a dilute mineral acid medium. However, it gave a precipitate (R) with H2S in an ammoniacal medium. The precipitate R gave a coloured solution (S), when treated with H2O2 in an aqueous NaOH medium. (JEE Adv. 2013-II)

Q. The coloured solution S contains

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 5

The filtrate on treatment with ammoniacal H2S gives a precipitate which dissolves in aqueous NaOH containing H2O2 giving a coloured solution. It contains Cr3+ ion.

Test: Comprehension Based Questions: Analytical Chemistry - Question 6

PASSAGE-3
An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents.
Aqueous solution of M2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarized in the scheme given below:

Scheme:

6. M1, Q and R, respectively are (JEE Adv. 2014)  

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 6

Test: Comprehension Based Questions: Analytical Chemistry - Question 7

PASSAGE-3
An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents.
Aqueous solution of M2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarized in the scheme given below:

Scheme:

Q. Reagent S is (JEE Adv. 2014)

Detailed Solution for Test: Comprehension Based Questions: Analytical Chemistry - Question 7

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